Effect of heat treatment on the porosity of SLS foam glass

Reference Presenter Authors
11-022 Manoel Cruz Barbosa Neto Barbosa Neto, M.C.(Federal University of São Carlos); Crovace, M.C.(Federal University of São Carlos); Zanotto, E.D.(Federal University of São Carlos (UFSCar)); Rodrigues, A.C.(Federal University of São Carlos); Soda-lime-silica (SLS) glass foam is a lightweight material that shows good mechanical properties, thermal stability, sound absorbing properties, water and steam resistance, freeze-thaw cycle tolerance and good chemical durability. These unique properties allow SLS glass foams to have several applications such as thermal and acoustic insulator in the construction and other industries. The foaming process is strongly dependent of raw material characteristics and processing conditions such as glass composition, foam agent and foaming temperature. In this work, we aim to obtain a foam glass from industrial waste SLS glass. We defined and varied some conditions related to the foaming process and analyzed the effect of these conditions on the resulting porosity, microstructure and mechanical properties. In general, different porosity levels were obtained for different heating rates. These findings enabled us to define the best production route (foaming temperature, heating rate, holding time) to form a foam glass with homogeneously distributed porosity, from a specific industrial SLS waste glass.
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